More extension work.

1 files changed, 107 insertions, 0 deletions

diff --git a/extension/ordchr2.c b/extension/ordchr2.c
new file mode 100644
index 00000000..1f4a1fcb
--- /dev/null
+++ b/extension/ordchr2.c
@@ -0,0 +1,107 @@
+/*
+ * ordchr.c - Builtin functions that provide ord() and chr() functions.
+ *
+ * Arnold Robbins
+ * arnold@skeeve.com
+ * 8/2001
+ * Revised 6/2004
+ */
+
+/*
+ * Copyright (C) 2001, 2004, 2011 the Free Software Foundation, Inc.
+ * 
+ * This file is part of GAWK, the GNU implementation of the
+ * AWK Programming Language.
+ * 
+ * GAWK is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * GAWK is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "gawkapi.h"
+
+static const gawk_api_t *api;	/* for convenience macros to work */
+static awk_ext_id_t *ext_id;
+
+int plugin_is_GPL_compatible;
+
+/*  do_ord --- return numeric value of first char of string */
+
+static int
+do_ord(int nargs)
+{
+	const awk_value_t *str;
+	awk_value_t result;
+	double ret = -1;
+
+	if  (do_lint && nargs > 1)
+		lintwarn(ext_id, "ord: called with too many arguments");
+
+	str = get_curfunc_param(0, AWK_PARAM_STRING);
+	if (str != NULL) {
+		ret = str->str_value.str[0];
+	} else if (do_lint)
+		lintwarn(ext_id, "ord: called with no arguments");
+
+	/* Set the return value */
+	set_return_value(make_number(ret));
+	return 1;
+}
+
+/*  do_chr --- turn numeric value into a string */
+
+static int
+do_chr(int nargs)
+{
+	const awk_value_t *num;
+	awk_value_t result;
+	unsigned int ret = 0;
+	double val = 0.0;
+	char str[2];
+
+	str[0] = str[1] = '\0';
+
+	if  (do_lint && nargs > 1)
+		lintwarn(ext_id, "chr: called with too many arguments");
+
+	num = get_curfunc_param(0, AWK_PARAM_NUMBER);
+	if (num != NULL) {
+		val = num->num_value;
+		ret = val;	/* convert to int */
+		ret &= 0xff;
+		str[0] = ret;
+		str[1] = '\0';
+	} else if (do_lint)
+		lintwarn(ext_id, "chr: called with no arguments");
+
+	/* Set the return value */
+	set_return_value(dup_string(str, 1));
+	return 1;
+}
+
+static awk_ext_func_t func_table[] = {
+	{ "ord", do_ord, 1 },
+	{ "chr", do_chr, 1 },
+};
+
+/* define the dl_load function using the boilerplate macro */
+
+dl_load_func(api, ext_id, func_table, ord_chr, "")